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progress function example: include timed interval 

Adds a timer based off of CURLINFO_TOTAL_TIME that is used to perform
certain actions after a minimum amount of time has passed using the
progress function. As a consequence the curl handle is now also passed
into the progress function. Progress example now also includes an
example of how to retreive the TOTAL_TIME and print it out.
This commit is contained in:
Rob Ward 2011-12-05 23:07:38 +01:00 committed by Daniel Stenberg
parent 3bbe219be2
commit 7e4daaf908
1 changed files with 27 additions and 1 deletions
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28
docs/examples/progressfunc.c
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@ -22,12 +22,32 @@
#include <stdio.h>
#include <curl/curl.h>
#define STOP_DOWNLOAD_AFTER_THIS_MANY_BYTES 6000
#define STOP_DOWNLOAD_AFTER_THIS_MANY_BYTES 6000
#define MINIMAL_PROGRESS_FUNCTIONALITY_INTERVAL 3
struct myprogress {
double lastruntime;
CURL *curl;
};
static int progress(void *p,
double dltotal, double dlnow,
double ultotal, double ulnow)
{
struct myprogress *myp = (struct myprogress *)p;
CURL *curl = myp->curl;
double curtime = 0;
curl_easy_getinfo(curl, CURLINFO_TOTAL_TIME, &curtime);
/* under certain circumstances it may be desirable for certain functionality
to only run every N seconds, in order to do this the transaction time can
be used */
if((curtime - myp->lastruntime) >= MINIMAL_PROGRESS_FUNCTIONALITY_INTERVAL) {
myp->lastruntime = curtime;
fprintf(stderr, "TOTAL TIME: %f \r\n", curtime);
}
fprintf(stderr, "UP: %g of %g DOWN: %g of %g\r\n",
ulnow, ultotal, dlnow, dltotal);
@ -40,11 +60,17 @@ int main(void)
{
CURL *curl;
CURLcode res=0;
struct myprogress prog;
curl = curl_easy_init();
if(curl) {
prog.lastruntime = 0;
prog.curl = curl;
curl_easy_setopt(curl, CURLOPT_URL, "http://example.com/");
curl_easy_setopt(curl, CURLOPT_PROGRESSFUNCTION, progress);
/* pass the struct pointer into the progress function */
curl_easy_setopt(curl, CURLOPT_PROGRESSDATA, &prog);
curl_easy_setopt(curl, CURLOPT_NOPROGRESS, 0L);
res = curl_easy_perform(curl);